On Monday night, special counsel John Durham released what could be the smoking gun in the case against Hillary Clinton lawyer Michael Sussmann in his investigation of Russiagate. According to newly published documents, Sussman, who was indicted last September for concealing his clients, messaged the FBI general counsel on Sept. 18, 2016, and said unambiguously that he was not working for any client while he was, in fact, working for Hillary Clinton’s presidential campaign. Sussmann’s lawyers claimed last year that the charges against their client were false and that they were made based on an unsubstantiated verbal statement. “The Special...